netdev - Re: [PATCH] veth: delay peer link configuration after interfaces are tied

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Message-ID: <574C5A02.4020606@6wind.com>
Date:	Mon, 30 May 2016 17:19:30 +0200
From:	Nicolas Dichtel <nicolas.dichtel@...nd.com>
To:	Vincent Bernat <vincent@...nat.im>,
	"David S. Miller" <davem@...emloft.net>,
	Vijay Pandurangan <vijayp@...ayp.ca>,
	Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org
Subject: Re: [PATCH] veth: delay peer link configuration after interfaces are
 tied

Le 30/05/2016 12:13, Vincent Bernat a écrit :
> When the peer link is created, its "iflink" information is not
> advertised through netlink. If a user is maintaining a cache from all
> updates, it will miss this information:
> 
>     2: veth0@...E: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default
>         link/ether ae:0e:08:af:fb:a0 brd ff:ff:ff:ff:ff:ff
>     3: veth1@...h0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN group default
>         link/ether 3a:31:f1:36:2e:e5 brd ff:ff:ff:ff:ff:ff
> 
> To avoid this situation, the peer link is only configured after both
> interfaces are tied together:
> 
>     3: veth0@...h1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default
>         link/ether ee:0d:80:46:36:fe brd ff:ff:ff:ff:ff:ff
>     4: veth1@...h0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN group default
>         link/ether ba:25:bc:7a:0d:c8 brd ff:ff:ff:ff:ff:ff
> 
> Signed-off-by: Vincent Bernat <vincent@...nat.im>
> ---
Please specify the version in the title (something like '[PATCH net v3]' here,
see --subject-prefix).

Also add the changelog after the '---' (see --annotate).